Sterilizer for milk and other liquids



Oct. 2, 1934. M. A. I. DE SOUZA STERILIZER FOR MILK AND OTHER LIQUIDSFiled April 25, 1932 En enfir. 77 411762501121 Patented Oct. 2, 1934STERILIZER FOE BULK AND OTHER LIQUIDS Marcos Antonio Inglez de Souza,Rio de Janeiro, Brazil Application April 25, 1932, Serial No. 607,430

1 Claim.

The improvements consist in the use of materials which are badconductors of heat, for the manufacture of the apparatus, and also inthe adaptation and conjugation of electrical resistances to thermicflask or recipients in order that a higher thermic energy be obtainedwith a mini mum of cost and unequalled hygienic results.

The property of thermos flask to retain heat for a long period of timeis well known, nevertheless, this property has not, as yet, had thedesired and expected manifold applications, not only due to the manydifliculties in their manufacture, but also, and principally, because oftheir high cost. Were it not for a few domestic uses, their applicationis as yet very restricted.

Electric energy for the production of heat has not been very extensivelymade use of up to now because, being very expensive, it cannot beundertaken by manufacturers as a business proposition, because theydesire to save cost of production and, for that reason, desist from itsapplication despite the many advantages it may present.

The use of bad heat conductors in devices which are to be subject toheat has also not been recommended by reason of the very nature of thepurposes for which they are intended.

No one, however, up to this day, has thought of the possibility orpossibilities of the congregation of these two elements for the purposeof ob taining a practical industrial result. Nor has any one everthought of the possibility, in certain cases, of taking advantage of thetransmission of electric thermic energy by conjugating it through athermos flask, to render it more economic than others, because acting indirect contact with the liquid to be sterilized in a recipient which isa bad conductor of heat, it reduces its consumption to a minimum,besides having other advantages which result therefrom and which shallbe considered hereinafter.

No one has ever thought of the complementary service that, in such acase, may be rendered by the thermic recipient or flask, by eliminating,for a considerable length of time, the need of a greater addition ofthermic energy, and compensating its initial high cost because of itsnegligible subsequent cost, by reason of the same recipient or flaskbeing used for a double purpose, without further interference or workwith a minimum cost of adaptation.

The consumption of electric energy or kw., although high at the outset,is negligible once the desired temperature has been reached, it beingpossible to automatically commutate such temperature, as may be desired,or even to intensify it within a few seconds without further cost orwork, except that of reconnecting the current, which is not to be foundother systems which require a constant consumption of energy anduninterrupted vigilance.

The points of entry of the thermic energy in direct contact with theproduct being reduced to one or several small openings and, for thatreason, almost eliminating contact with any external surface of theapparatus, render the application of the thermic flask or recipientabsolutely advisable and recommendable for that special purpose, a factwhich does not occur in any other heating system, the application ofwhich, in such a case, would be of very little advantage.

The advantage of the use of the thermic flask or recipient as asterilizer is of further importance and worthy of greater notice in viewof the fact that, preferably, for the manufacture of the sterilizingrecipient, any material may be used which is not a good conductor ofheat, such as porcelain, glass or others, contrary to all other knownsterilizers in the manufacture of which only good conductors of heat areemployed, and, furthermore, permitting the substitution of copper forother metals less subject to the dangerous oxidation of the latter.

In the accompanying drawing one embodiment of the invention isillustrated, wherein Fig. l is a top plan view of the flask and Fig. 2is a vertical section.

The sterilizer that I have invented consists of the following mainparts:

A thermic flask or recipient, (12) moulded in one or more pieces,according to its size, and is made from any suitable material, which ispreferably not a good heat conductor. The flask has double wallscomprising an inner wall 30 lined on Q the outer surface with a layer ofheat insulating material 31 which is, in turn, protected by an outercover or jacket 32 of aluminium or other metal, according to theinstallations and the purposes in view. The internal wall 36 of theflask or recipient, being air-proof, gives it its thermic qualities orproperties. End covers 37, 3S similarly constructed are also provided.

This flask or recipient is provided with one or. more electricresistances, (26) located either in the body of the flask or recipientor in its lid or bottom.

The flask or recipient is provided with a thermostat (27), to commutate,automatically if so desired, the current of thermic energy.

The said flask or recipient is also provided with a point of entry 3 forthe charge which, after receiving the liquid to be sterilized, projectsit against its internal walls by means of a spout 33, so that anyquantity of liquid therein contained will be completely mixed with thequantity added to it and then flows back to the surface. A pres suremanometer is adapted to the apparatus, also a load and level manometer,34) and at the point of entry of the load a device which permits it tobe charged under pressure, so that the sterili- Zation, carried out inthis manner, does not bring about or cause loss of carbonic gas.

An exit (35) is furnished which may also be supplied with a siphon, soas to permit the conneetion of one or more therinic recipients or flasksto said sterilizer, also in series, so that, with only one apparatus, agreater quantity of milk or of any other liquid may be sterilized withgreat economy and speed. An agitating device (36), is also shown.

I claim:

A sterilizing apparatus for milk and other liquids, consisting in thecombination of an electric heating device witha thermic recipient in theform of a double walled flask filled with insulating material in thespace formed between the walls, a filling spout for said liquid in theupper end of the flask adapted to deliver the liquid against the innersurface of said flask, means for agitating the liquid in the flask, saidheating device comprising electric resistances supported in the walls ofthe flask and projecting inwardly in order to directly contact with theliquid.

. MARCOS ANTONIO INGLEZ DE SOUZA.

